Violins are available in 8 different sizes:
4/4 (also called full size), 3/4, 1/2, 1/4, 1/8, 1/10, 1/16 and 1/32.
Size 4/4 is the biggest and size 1/32 is the smallest. All adults,
regardless of their size, use the size 4/4 violin.

To measure what size violin best suits you, you need to know the
length between your neck and the middle of your left-hand palm (when
your hand is fully extended and raised perpendicular to your body, just
like holding a violin). Most of the teachers prefer students to use the
length from the neck to the wrist for measurement instead of the neck
to mid-palm approach. The violin size determined by the neck/wrist
approach would be the size that is more comfortable for students to
hold. The violin size determined by the neck/mid-palm approach would be
the biggest size students should use.

If you have a teacher, you should ask for your teacher's
recommendation. If you don't have a teacher, we would recommend using
the neck/wrist approach for students not using full size; for students
who are deciding whether to used size 3/4 or size 4/4, use the
neck/mid-palm approach. This is because it is always better those
students feeling comfortable holding and playing the violin. However,
while deciding between size 3/4 and size 4/4, if neck/mid-palm approach
allows for size 4/4, then buying a size 4/4 is more economical since
you don't have to buy another bigger size violin later. This is
completely based on economical consideration. You should still decide
what best suits your need.

The following table lists the length of each violin size. Find
your length using your preferred approach and use that to determine the
size of violin to get.